Pump



SSP- 21, 1965 K. D. LoHRY ErAL 3,207,083

PUMP

Filed Aug. 21, 1963 3 Sheets-Sheet 1 HG WrraeA/f Ys.

Sept. 21, 1965 K. D. LoHRY rAL PUMP 5 Sheets-Sheet 2 Filed Aug. 2l, 1963TOR5 INVEZI AL 6l 551/5 WML/AM A fraz/v5 Ys.

Sept. 21, 1965 K. D. L oHRY ET AL 3,207,083

PUMP

Filed Aug. 2l, 1963 3 Sheets-Sheet 3 6666 /16 1z0 12a l/ 6@ 7 Y Vf/Q i h6@ 5@ 54 www I' i 76 -A' Jim- N" ff United States Patent C) 3,207,083PUMP Kermit Dean Lohry, 1721 Rebecca St.; Leslie William Lohry, 2315Kennedy Drive; and Royal Q. Lohry, 1714 W. 17th, all of Sioux City, IowaFiled Aug. 21, 1963, Ser. No. 303,509 3 Claims. (Cl. 103--175) Thisinvention relates to a pump and more particularly to a fluid or liquidpump capable of supplying a steady flow of fluid material underextremely efficient operating conditions.

As conducive to a better understanding of the instant invention itshould be understood that most conventional pump devices now in use,such as the well known diaphragm pump or gear pump, normally have acurve of flow of fluid material which varies with the position of thecomponents providing a non-uniform rate of flow. Also, prior artstructures are relatively inefficient requiring undue operating powerand providing limited flow through. Furthermore, pump devices knownheretofore have had a specific pumping capacity or have beenunnecessarily complex in providing for adjustability thereof.Conventional structures of this type are also deficient in that they areincapable of being accommodated to specic operating necessities therebyrequiring special pumping devices to be maintained for each operation.

A primary object of this invention is to provide a pump free from theforegoing and other disadvantages.

Another object of the instant invention is the provision of a pumphaving four Valve means readily re-arrangeable and providing a steadyflow of fluid material without the normal curve of flow found inconventional pumping devices known heretofore.

A further object of the instant invention is the provision of a pumpingstructure wherein the valve cages and the valve means contained thereinmay be readily interchanged and removed for inspection or repair andwherein each of the valve means may be readily reversed within itsrespective valve cage to change the direction of the fluid flow throughthe pump.

A still further object of this invention is to provide a device of thecharacter described, the assembly of which may be readily adapted topump a first fluid material on the instroke of a piston means forming anintegral part of the structure, and a second fluid material on theoutstroke thereof so that the two fluids may be equally blended at thesame time they are pumped.

Yet another object of the instant invention is the provision of apumping device having a piston means with a packing formed of asynthetic material which requires no priming and is f such wearresistant nature that it will run dry without damage and will be highlyself-sealing so that it will hold its prime.

A further object of this invention is to provide a pumping structurehaving a drive means including an antifriction or slider block which isparticularly efficient reducing the necessary operating power.

An additional object of the instant invention is the provision of aneccentric drive means or a pumping device which is readily variable toadjust the stroke of the pump and thus can control the gallonage flow.

A still further object of the instant invention is to provide a pump ofthe type described which is readily adaptable to virtually any materialby the simple expedient of changing the valve means inside each or anyof the valve cages pointed out as the description of the inventionproceeds and as shown on the accompanying drawings wherein:

FIGURE l is a top plan view of a pumping device in accordance with theinstant inventive concept showing one arrangement of the componentsthereof and with parts broken away for illustrative convenience;

FIGURE 2 is a front plan view thereof;

FIGURE 3 is an enlarged cross-sectional View taken substantially on line3-3 of FIGURE l and showing in detail the variable eccentric drivemeans;

FIGURE 4 is a transverse cross-sectional view` taken substantially online 4-4 of FIG. 3, with parts broken away for illustrative convenience;

FIGURE 5 is an enlarged cross-sectional view taken substantially on line5 5 of FIG. 2 showing in detail the slider block construction, withparts broken away for illustrative convenience;

FIGURE 6 is a transverse cross-sectional View taken substantially online 6-6 of FIGURE 5;

FIGURE 7 is an enlarged sectional View taken substantially on line 7-7of FIGURE 1 showing an end view of the pump and valve assembly;

FIGURE 8 is an enlarged sectional view taken substantially on line 8 8of FIGURE 1;

FIGURE 9 is an enlarged cross-sectional view taken substantially on line9-9 of FIGURE 1 showing in detail the piston means, with parts brokenaway for illustrative convenience;

FIGURE 10 is an enlarged cross-sectional view taken substantially online 10-10 of FIGURE 2 showing in detail the internal components of thepump and valve assembly; and

FIGURE 1l is a schematic view of a rearrangement of the components ofthe pumping device of the instant invention for use in pumping andsimultaneously equally blending two different fluid materials.

Similar reference characters refer to similar parts throughout theseveral views of the drawings.

Referring now to the drawings, and more particularly to FIGURES 1 to 10,inclusive, a pump device in accordance with the instant invention isdesignated generally by the reference numeral 20 and comprises basicallya pump and valve assembly shown at 22, and a drive means thereforincluding linkage means generally designated 24, an anti-friction orslider block shown generally at 26 for guiding and frictionlesslysupporting the linkage means 24, and an eccentric means designatedgenerally by the reference numeral 28 for receiving rotary power from amotor means (not shown) and adjustably translating the same intoreciprocatory power to operate the pump 20.

The pump and valve assembly 22 includes a cylinder 30 defining a chambertherewithin having a forward portion 32 and a rearward portion 34separated by a piston means 36 slidably mounted within the cylinder 30intermediate the ends thereof.

The piston means 36 includes a piston shaft 38 and a piston member 40,the latter element being formed of a central backing plate 42 on eitherside of which are piston washers 44 preferably formed of apolytetrailuoroethylene such as Teon manufactured by DuPont combinedwith a stiffening agent, such as fiberglass and having peripheral edgeportions in fluid tight contact with the interior wall surfaces of thecylinder 30. Retainer plates 46 are backed by washers 48, the entireassembly being removably securedto a threaded reduced end portion of thepiston connecting rod or shaft 38 by nut means 50.

The piston connecting rod 38 passes through an end block 52 having athreaded nipple 54 thereon. A packing sleeve 56 circumscribes pistonconnecting rod 38 as do packing seals 58 formed of conventionalhydraulic packing material and a packing nut 60 is threadably secured onthe nipple 54 to maintain the packing in position.

The cylinder 30 engages at opposite ends in notches defined in endblocks 52 and 62, respectively, against O-rings or other conventionalgasket materials 64, these elements being secured in related assembly bystud means 66 and nut means 68.

First, second, third, and fourth valve cages, 70, 72, 74, and 76,respectively, have first, second, third, and fourth valve means 78, 80,82, and 84, respectively, removably supported therein in a manner to bemore fully described hereinafter. Each valve cage is divided into twoportions, one portion being defined by spacer cans 86, 88, 90, and 92,respectively, and the other portion being defined by end cans 94, 96,98, and 100, respectively, the spacer and end cans of each valve cagehaving peripheral edges adapted to mate at 102, 104, 106, and 108,respectively, when the valve cages are in assembled relationship. Thespacer cans 86, 88, 90, and 92 abut in sealing relationship O-rings 110,112, 114, and 116, respectively, seated in grooves formed in end blocks52 and 62, the valve cages being maintained in related assembly with theend blocks by assembly straps 118, stud means 120, and nut means 122.

Each spacer and end can has an inwardly directed peripheral flangesmeans 124 secured adjacent its aforementioned mating peripheral edge,these peripheral flanges receiving outwardly extending peripheralportions of support members 126 forming integral elements of valve means78, 80, 82, and 84, respectively, O-rings 128 or the like beinginterposed to insure sealing contact. The support members 126 each haveat least one aperture 130 defined therethrough and slidably receivedoubleheaded valve stems 132 carrying valve plates 134 on one side ofsupport members 126 adapted to close the apertures 130 when in contactwith the support member 126. Spring means 136 circumscribe valve stems132 on the opposite side of support plates 126 and normally bias valveplates 124 into contact with support members 126. The tension of springmeans 136 is less than the pressure, either positive or negative, causedby the reciprocation of piston means 36 as explained hereinafter so thatcertain valve plates 134 are lifted when the piston means 36 movesforwardly within the cylinder 30 and other valve plates 134 are liftedwhen the piston means 36 moves rearwardly therewithin.

A first conduit means 138 is defined in end block 52 communicatingbetween one portion of the first valve cage 70 and the rearward portion34 of the chamber within cylinder 30. A second conduit means 140 isdefined in end block 52 communicating between one portion of the secondvalve cage 72 and the rearward portion 34 of the chamber. Third andfourth conduit means 142 and 144, respectively, are defined in end block62 communicating between one portion of third and fourth valve cages 74and 76, respectively, and the forward portion 32 of the chamber withincylinder 30. Additional conduit means such as formed by hoses 146 and148 communicate between and interconnect the other portions of secondand third valve cages 72 and 74, respectively, and first and fourthvalve cages 70 and 76, respectively, hose clamps 150 of conventionalform being shown as clampingly engaging the hoses 146 and 148 aboutnipples 152, 154, 156, and S on the end cans of each Valve cage.

The other portion of at least one of the valve cages, first valve cage70 as shown in the drawings, includes means defining an inlet 160communicating with a source of uid material (not shown) to be pumped bythe device of the instant invention. The other portion of at least oneother valve cage, second Valve cage 72 as shown in the drawings,includes means defining an outlet 162 which may communicate with aconventional surge chamber 164 shown in dotted lines in FIGURE 10 tofurther reduce any non-uniformity in flow, such a chamber being foundunnecessary with the device of the instant invention for mostapplications because of the evenness of ow produced by the novelarrangement of component parts.

The linkage means 24 includes a jam nut 166 locking the piston shaft Itoa pump connector 168 having bifurcated portions receiving therebetweenpart of a knuckle assembly 170 connected by a stud 172 to a reverseknuckle assembly 174 which in turn is pivotally secured to a stud 176forming part of the adjustable eccentric means 28.

Substantially frictionless bearing means 178 are rotatably connectedthrough the bifurcated portions of pump connector 168 and the knuckleassembly 170 and are ridingly received upon the lower portion of a guidechamber 180 of substantially rectangular cross-section defined by theslider block 26.

The eccentric means 28 includes an ecentric block 182 defining alongitudinally extending guide chamber 184 therewithin slidinglycarrying an adjusting block 186 which threadably receives alongitudinally extending adjusting 4stud 188 having a manually rotatablewing nut head 190 extending through one end of the eccentric block 182.Pivot stud 176 extends transversely from the adjusting block 186 and isreceived in a longitudinally extending slot 192 in the side of theeccentric block 182. The reverse knuckle assembly 174 is pivotallysecured on stud 176 between a spacer 194 and a lock nut 196. Means suchas a nipple 198 extend transversely from eccentric block 182 and receivea motor shaft power take off 200 being locked thereto for rotationtherewith in any conventional manner, such as by key means 202. A gaugepointer 204 rides over a scale means 206 secured externally to theeccentric block 182 to indicate the offset distance between the means198 and the pivot stud 176 thereby facilitating measurement of thereciprocation of piston means 36 and the output from the pump 20.

The use and operation of the device of the instant invention as arrangedin FIGURES l to 10 will now be apparent. The motor means (not shown)will rotate the motor shaft 200 which will in turn rotate the eccentricmeans 28 to translate the rotary power to reciprocatory power carriedthrough linkage means 24 to the piston shaft 38 and causing forward andrearward movement of the piston means 36. Variation of the length ofstroke may be readily adjusted by loosening the jam nut 166 and turningthe adjusting stud 188 to vary the offset distance between the nipple198 and the pivot stud 176. As the piston means 36 moves forwardlywithin the cylinders 30 fiuid material is withdrawn from a remote source(not shown) through the inlet 160 into the valve cage 70 and upwardlythrough the apertures 130 of the support member 126 of valve means 78,the valve plate 134 of which has been lifted against the tension ofspring means 136 by the suction caused by the forward motion of pistonmeans 36. The fluid material then passes through first conduit means 138into the rearward portion of the chamber within the cylinder 30, beingunable to pass outwardly through the second conduit means 140 since thevalve plate 134 of second valve means 80 has been pulled into closedrelationship by the tension of spring means 136 and by the suction fromforward movement of the piston means 36 and also being unable to passthrough additional conduit means 148 since valve plate 134 of fourthvalve means 84 is closed by the tension of spring means 136 and thepositive pressure on its top face from the forward movement of thepiston means 36. Fluid material within the forward portion 32 of thechamber defined by cylinder 30 is forced through third conduit means 142and third valve means 82, the valve plate 134 of which has been openedagainst the tension of spring means 136 by the positive pressure causedby forward movement of the piston means 36. This fluid material passesthrough additional conduit means 146 over the top face of the valveplate 134 of second valve means 80 and out of the system through theoutlet 162 into surge chamber 164 if desired. On the rearward movementof piston means 36 valve plates 134 of first and third piston means 78and 82, respectively, are closed and valve plates 134 of second andfourth valve means 80 and 84, respectively, are opened, fluid materialpassing under first valve means 78 through additional conduit means 148and through fourth Valve means 84 and fourth conduit means 144 into theforward chamber 32 within the cylinder 30 to be later expelled on theforward stroke of the piston means 36 as described hereinbefore.Likewise, fluid material withdrawn into the rearward chamber 34 of thecylinder 30 on the forward stroke of the piston means 36, is expelledthrough second conduit means 140 and second valve means 80 to outlet 162on the rearward movement of piston means 36.

It will be readily seen that any of the valve cages may be readilyremoved by simply loosening bolt means 122 and hose clamps 150. Thevalve cages are interchangeable as are the valve means and each valvemeans may be readily reversed within its respective valve cage by simplyseparating the spacer and end cans thereof and inverting the supportmember of the valve means before reassembling the same within its valvecage.

FIGURE 11 schematically shows a slight variation in the arrangement ofthe component parts of the pump of the instant invention to allow forthe equal blending and simultaneously pumping of two different fluidmaterials. All of the elements are interconnected in a manner similar tothe embodiments of FIGURES 1 to l0 except that fourth valve cage 76 isprovided with means defining an inlet 160 in addition to the inlet 160forming part of first valve cage 70. A common outlet 162 is provided onsecond valve cage 72' and second and third valve cages 72 and 74respectively are interconnected by an additional conduit means 146.However, the nipples 152 and 158 of rst and fourth valve cages 7 0' and7 6 respectively are not interconnected as in the arrangement of FIGURES1 to 10 but are sealed so that on the forward stroke of piston means 36a first fluid is withdrawn from a remote source through inlet 160' andthe valve means within valve cage 70 to the rearward portion 34 of thechamber defined within the cylinder 30. This first fluid material isexpelled through the common outlet 162 by being forced upwardly throughthe second conduit means and the second valve means within the secondvalve cage 72 on the rearward movement of the piston means 36'. Aquantity of a second fluid material is withdrawn from a remote sourcethrough the inlet 160 in the fourth valve cage 76 passing upwardlythrough the valve means and the fourth conduit means to be received inthe forward portion 32 of the chamber within the cylinder 30 on therearward movement of the piston means 36', this quantity of second fluidmaterial being expelled on the forward movement of the piston means 36by passing upwardly through third conduit means and the third valvemeans within the third Valve cage 74', and outwardly through additionalconduit means 146 to the common outlet 162'.

It will be readily seen that other variations on the specificarrangement of the component parts of the pump of the instant inventionmay be provided to satisfy various operational necessities.

It will now be seen that there has been herein provided a unique pumpwhich satisfies all of the objectives of the instant invention andothers, including many advantages of great practical utility andcommercial importance.

Since many embodiments may be made of the instant inventive concept, andsince many modifications may be made of the embodiments hereinbeforeshown and described, it is to be understood that all matter herein is tobe interpreted merely as illustrative, and not in a limiting sense.

We claim:

1. A valve and valve cage assembly for use in a pump of the typeincluding a cylinder defining a chamber having two ends, a pistonslidably mounted intermediate the ends,

and a plurality of valve cages having valves therein, wherein each valvecage includes one portion defined by a spacer can and another portiondefined by an open end can, said spacer and end cans of each of saidvalve cages having peripheral edges adapted to mate when said valve cageis in assembled relationship, each of said spacer and end cans havinginwardly directed peripheral flange means secured adjacent saidperipheral edges, each of said valve means including a support memberhaving an outwardly extending peripheral portion receivable between saidperipheral flanges of its respective spacer and end cans in fluid tightrelationship, and means removably securing said spacer and end cans ofeach valve cage in assembled relationship.

2. The structure of claim 1 wherein said support member of each of saidvalve means is substantially planar and includes at least one aperturedefined therethrough, a valve stem slidably mounted perpendicularlythrough said support member and carrying a valve plate on one side ofsaid support member, said valve plate being adapted to close theapertures in said support member when in contact therewith, spring meanson the other side of said support member normally biasing said valveplate into contact with said support member, the tension of said springmeans being less than the pressure caused by the reciprocation of saidpiston means, whereby certain of said valve plates are lifted when saidpiston means moves forwardly in said chamber and others of said valveplates are lifted when said piston means moves rearwardly in saidchamber.

3. The structure of claim 2 wherein said valve plates of alternate valvemeans are lifted when said piston means moves forwardly in said chamberand said valve plates of other alternate valve means are lifted whensaid piston means moves rearwardly in said chamber.

References Cited by the Examiner UNITED STATES PATENTS 33,914 12/61Willett 103-175 36,267 8/62 Bender 103-175 94,190 8/69 Dixon 103-176505,090 9/93 Carse 103-9 540,626 6/95 Barton 103-175 600,195 3/98 Dunn103-9 604,767 5/98 Kughler 103--175 670,796 3/01 Lynch 103-9 1,614,7331/27 Hufnagle 103-175 1,641,717 9/27 Welter 103-175 1,872,503 8/32Repschleger 103-6 2,019,479 11/35 Buttner 103-9 2,216,573 10/40 Owsley103-175 2,217,287 10/40 McNew 103-175 2,729,237 1/56 Hite 137-515.72,901,000 8/59 Wright 137-5157 2,933,049 4/ 60 Johnston 103-1752,943,639 7/60 Smith 137-5157 2,957,422 10/60 Loeber 103-40 2,962,97512/60 Camp 103-175 3,007,349 11/61 Loeber 74-571 3,040,666 6/62 Flynn103-38 3,073,256 1/ 63 Browne 103-228 3,116,648 1/ 64 Arenhold 74-600FOREIGN PATENTS 402,810 9/09 France. 753,821 8/33 France. 256,932 1/28Italy.

LAURENCE V. EFNER, Primary Examiner.

1. A VALVE AND VALVE CAGE ASSEMBLY FOR USE IN A PUMP OF THE TYPEINCLUDING A CYLINDER DEFINIGN A CHAMBER HAVING TWO ENDS, A PISTONSLIDABLY MOUNTED INTERMEDIATE THE ENDS, AND A PLURALITY OF VALVE CAGESHAVING VALVES THEREIN, WHEREIN EACH VALVE CAGE INCLUDES ONE PORTIONDEFINED BY A SPACER CAN AND ANOTHER PORTION DEFINED BY AN OPEN END CAN,SAID SPACER AND END CANS OF EACH OF SAID VALVE CAGES HAVING PERIPHERALEDGES ADAPTED TO MATE WHEN SAID VALVE CAGE IS IN ASSEMBLED RELATIONSHIP,EACH OF SAID SPACER AND END CANS HAVING INWARDLY DIRECTED PERIPHERALFLANGE MEANS SECURED ADJACENT SAID PERIPHERAL EDGES, EACH OFF SAID VALVEMEANS INCLUDING A SUPPORTED MEMBER HAVING AN OUTWARDLY EXTENDINGPERIPHERAL PORTION RECEIVABLE BETWEEN SAID PERIPHERAL FLANGES OF ITSRESPECTIVE SPACER AND END CANS IN